These new consolidated guidelines bring together all existing World Health Organization (WHO) guidance relevant to five key populations: men who have sex with men, people who inject drugs, people in prisons and other closed settings, sex workers and transgender people. It includes a number of new recommendations and updates existing guidance and recommendations. These guidelines aim to:
1 provide a comprehensive package of evidence-based HIV-related recommendations for key populations
2 increase awareness of the needs of and issues important to key populations
3 improve access to, uptake and coverage of effective and acceptable services and
4 catalyze greater national and global commitment to adequate funding and services.

The guidelines include a comprehensive package of interventions comprising the clinical interventions and critical enablers required for successful implementation of programmes for the five key populations. These guidelines also consider service delivery issues and provide guidance on decision-making, planning, and monitoring and evaluation.